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June of 2022 marks the twentieth anniversary – yes – TWENTIETH – of the publication of the Session Initiation Protocol (SIP), documented in RFC 3261. When it was published in June of 2002, it set records for the longest specification produced by the Internet Engineering Task Force (IETF), at 269 pages. The IETF produces the technology standards that make the Internet work.…
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To DIsney, Apple, Hulu, Ultraviolet and the rest of you:Please, please stop the madness. All of us folks on the Internet are glad that we're finally seeing ways to get and access movies online and then watch them across PC, smartphones, tablets and sometimes connected TVs. It looks like the industry is generally heading towards the model of a video locker, which stores the set of movies I'm…
This week, I gave a two hour talk to the Freehold High School Computer Science Academy on how VoIP works. This ended up being quite a bit of work actually, since I needed to distill my existing tutorials to something a high school student could understand. I ended up needing to explain a bunch of core IP concepts first. Here's what I came up with. The feedback from the students was positive - many…
IP communications services - voice, video and chat and the many variations therein - are all the rage again. Startups are sprouting daily. Though some focus just on mobile, many are building cross-platform applications.When building such a service, the first and most important capability that you need to build is perhaps not so obvious. It is not wideband voice. It is not chat. It is automated…